Detachable boiler-flue.



No, 885,662. PATENTEDAPR'ZI, 1908.

A. J. BOWDEN.

DETAGHABLE BOILER PLUE; APPLICATION FILED MAY 31, 1907.

M/TMSSSRS arm-wrae UNITED STATES PATENT orrron.

ALEXANDER J. 'BOWDEN, or MINNEA OLIS; MINNESOTA, ASSIGNOR or ONE-HALF TOiiMos B.. ROBBINS,- OF ELROY, WISCONSIN.

. 1'; m ness,nonnative.

To all'whom it may con-am:

Be it'known that "I, ALEXANDER: JlBowof which thefollowing is aspecification.

My inventionielates to detachable boiler" hues, and the object oftheinvention is to provide means for securing the flue in the flue venientremoval of the flue whenever desired. A further object is to providemeans whereby the ends of the flue will be protected fromrthe heat inthe fire box.

The invention consists generally in'various '-constructions, andcombinations, all as here.- lnafterdescribed and particularly pointedout in the claims.

.In'the accompanying drawings, forming.

part of this specification, Figure 1 is; a view partially-in section,and partiallyin plan illustrating thefapplication of my invention to aboiler flue and flue sheet. Fig.- 2 is asimilar view illustratin amodification in the man'- ner of uniting tire flue with-the end sectionthereof. Fig.3 is a similar view showing another modification. I l i Inthe drawing, 2 represents the flue sheets havingflue seats 3 and 4tapered slightly in .30

opposite. directions, that is each seat flares from the inner toward theouter surface of theflue sheet. I 1 v 5 represents a flue having theend-extension's or sections 6 and 7. These extensions are rovided withsockets 8 in which the ends of tlie flue are brazed or-welded by anelectric or other suitable process. l

. The end section 6 is ta ered from its inner toward its outer end, andthe section 7 is ta pered from its outer toward its inner end. A sleeve9, tapered from its outer towardits inner end, is ada ted to slip inbetween the end section 6 an the flue seat 3, a suitable packing rinsleeve and the se at. At the other end of the flue a similar packin ringis provided be- 10 being arranged between the tween the tapered ensect1on'7 and the seat 4. The section 7 will 'be driven into its seat inthe flue sheet and then the sleeve9 insert ed at the other end of theflue and while it is being driven in, a tool may be held a ainst thesection 7 to prevent the flue from ein'g driven out at that end. Whenthe sleeve 9 has been firmly driven to its seat a tight joint be formedaround the end ofthe flue sheets which permit the ready and con-fSpecification of LettersPatent. ;l atente'd Apii1.21,1908,Applicationiiled-llayiil,1907. Se'rial-No.'376,625.

l without the use of threads. Whenever it is desired to remove a flu'e'a suitable tool is applied. to the en'd'of the section 6 and theflue'mav be driven'ou't of the sheets and readily 'reic'nove'd from theboiler.

In 2 I have illustrated anend section 11' having'an, annular recess orgroovelZ in its innerien'd torecei've the end 0t the'flue.

In other respectsit corresponds to the end sections above described.

, In Fig. 3 another modified form of end section 13 is shown in whichthe recesses and grooves are omitted and merely a square flat endprovided, against which the end of the flue abuts and is weldedor'brazed. ,These end sections are made of heaviermaterial andby using.them I am-able to protect the ends of the fire box.

, One of the particular advantages of this invention is its ease ofapplication to the boiler ue from the intense heat of'the' and thefacility with which a wornout flue' may be removed. I

I claim as my invention:

1. In a boiler, the combination, with the flue sheets spaced apart andin parallel relation with one another and having flue seats extendingtherethrough from one side to the other, said seats being tapered fromthe outer toward the inner surfaces of said sheets,

a flue extending between said sheets and having end sections fittingwithin the openings in said sheets, the section at the fire box end ofsaid flue being tapered from its outer end toward its inner end to fitthe flue seat at that endand having a suitable packing ring, and thesection at the opposite end of said fluebeing ta ered from its innerendtoward its outer en whereby both sleeves and the flue ma be driven inthe same direction out of the He sheets, and an oppositelytapered sleeveinclosing said last named section and fitting between it and its flueseat and having a suitable packing ring, substantially as described.

. 2. In a boiler, the combination, with the flue sheets'spaced apart andin parallel relation with one another and having flue seats extendingtherethrough from one side to the I other, saidseats being tapered fromthe outer toward the inner surfaces of said sheets, a

flue provided between said sheets, tapered sections mounted on the endsof said flue, said sections beingtapered in the same direction andfitting within the openings in said sheets,

a sleeve tapered from its outertoward its inner end fitting between oneof said sections and its'flue seat and adapted when tightened toform atight jointbetween the flue and seat,- andsaid flue being removable byapplyinga tool to the end of one of said sections and through fromoneside to the other,- said seats being tapered from the outer towardthe inner surfaces of said sheets, of-a flue having tapered ends, thetaper at the firebox'end v 15 of saidflue being toward the middle of theflue and-the taper at theopposite end of the fliie beingtoward its outerend, whereby a tool maybe appliedto drive it throughthe fiuesheets intothe'firebox; acking rings interposed between the ends 0? I the seatsthereof in the flue sheets and atapere'd sleeve fitting between the flue:andits packingring at the-end thereof opposite from the fire box;substantially asdescribed.

In witness whereof, I have hereunto set'my 25 I hand this. 28th day ofMay 1907,

. ALEXANDER .J. BOWD-EN. Witnesses:

RICHARD PAUL, J. B. ERA

the fine 4 and 20

